Illumination lamp



N. D. LEVIN ILLUMINATI ON LAMP Filed Oct. 22, 1929 Patented Oct. 8, 1935UNITED STATES PATENT OFFICE ILLUMINATION LAMP Application October 22,1929, Serial No. 401,534

10 Claims.

The invention relates to an illuminating lamp. Where it is necessary toprovide artificial light to facilitate operation of machinery or thelike,

great inconvenience has been caused by the tendency of lamps providingsuch light to be broken and put out of commission through thecarelessness of operators of machinery, or through the operation of themachinery itself.

For instance, in the case of a mining machine where artificial light isessential, the usual lamp attached to such machinery is not of durableenough construction to long withstand the operation of the machinery, orthe liability of workmen throwing tools on top of the machine andagainst the lamp.

it has also been found desirable in the case of mining machines and thelike, to provide a lamp which will throw a beam of light in anydirection and, at the same time, provide a shield from 2 9 the lightbehind which the operator can stand order not to be blinded by theglare.

The o ct of t in en i n is t o id a amp which can be placed on machineryof various type he e l nat n i c s y to aci itate operation of su m o inAnother object or the invention is'toprovide a lamp of such constructionas to be exceedingly strong and durab Another object of the invention isto provide 39 a lamp which will throw rays 9f light in the desireddirections.

,Still another object oi the invention is to proride a lamp which willbe cheap to manufacture and yet efiicient in every respect.

3 With these and other objects and advantages in mind, attention iscalled to the drawing, in which:

Figure 1 is a side elevation ,of the assembled lamp. c

Figure 2 is a plan view.

4, Figure 3 is a vertical cross section, and

Figure 4 is a view of the protective screen shield. Referringspecifically to the drawing, in which like numbers indicate like parts,there is pro vided a base member I having .ears 2 with apertures 3.therein for securely fastening the device in any suitable place on theequipment with which it is to be used. An insulation block 4 is securedto the inside of the base member I and has attached thereto a commonlamp socket 5,

in which is placed the usual electric light bulb 6. A stufiing box l5,of a design well known in the art, is provided for the passage of aconductor to the lamp socket. The base member is provided with anupwardly extending flange I having a groove 8 therein. A plurality ofbolts l4 having shoulders thereon are screw threaded into the outer edgeof the base member I.

A metal cap It is provided with a downwardly extending flange H, havingtherein groove ii. The metal cap fits upon shoulders on the tops, of 5the bolts l4, and is held securely in place by ordinary nuts. The baseand top members are constructed of metal, and have a sufiicient crosssection to withstand abnormal compression and also radiate heat causedby the illuminating element. 10

Within the grooves 8 and I2 is placed suitable packing l3, and tightlyheld by said packing is a cylindrical glass globe 9.

To prevent the breakage of the glass, a relatively'heavy wire screen I6is placed around the 15 shoulders I1 and [8 of the base and top members,respectively.

The screen shield may be a complete circle of open work, or it may bemade partly or sheet metal, such as is shown in Figure 4, wherein the 20wire screen I6 is connected by any suitable means to the sheet metalportion [9. Provided at the bottom of the sheet metal portion are aseries of holes 20 which, with the use of a sharp pointed tool, quickrotation of the metal part and screen 2, may be had, in' order that therays of light may be cast in the desired direction. i

In order to provide for brilliant reflection of the light,-the upperside of the base member, the under side of the cap member, and theinside of the sheet metal shield may be coated with white enamel or aphosphorous paint.

in the particular embodiment of my invention herein shown, the base andtop members are of circular design, although such circular construc- 35.

tion may be departed from. 4 7

My invention isnot limited to the exact construction herein shown, butis subject to various changes and modifications within the spirit oi theap ndedo m 1.';In a larnp, a base member having anupwardly extendingrib, a top member having a downwardly extending rib, an illuminatingelement interposed therebetween, independent to ri id se r sai members ta base and top members to each other, transparent protective meanssecured in said grooves, and a rotary protective means abutting theouter shoulders of said ribs.

3. In a lamp, a base member having an upwardly extending rib, a groovein said upwardly extending rib, an illuminating element attached to saidbase member, a top member having a downwardly extending rib, a groove insaid downwardly extending rib, means to rigidly secure said base and topmembers to each other, transparent protective means secured in saidgrooves, rotary protective means abutting the outer shoulders of saidribs, said rotary protective means being partly opaque.

4. In a lamp, a base member, an illuminating element carried by saidbase member, a top member, transparent protective means held betweensaid base and top members and surrounding said illuminating element, andprotective means mounted for rotation on said top and base members andhaving reticular and opaque sections.

5. In a lamp, the combination with a relatively heavy flat base member,of a relatively heavy flat opaque top member spaced therefrom, anilluminating element supported by said base member, transparentprotective means between said base member and said top member andcompletely surrounding said illuminating element, a rotary opaqueshutter in substantially vertical position outside of said transparentprotective means and between said base member and said top member, theshutter having the shape of a segment of a cylinder and constantlyobscuring the illuminating element from a point of View determined byits rotary adjustment while permitting the constant projection of lightfrom the lamp through the complementary segmental portion of thecylinder of which it is a segment, said shutter including a reflector onthe inner face thereof, and a plurality of bolts rigidly connecting thetop and bottom members.

6. In a lamp, the combination with a relatively heavy flat base member,of a relatively heavy flat opaque top member spaced therefrom, anilluminating element supported by said base member, transparentprotective means between said base member and said top member, a rotaryopaque shutter between said base member and said top member and outsideof said transparent protective means, the shutter having the shape of asegment of a cylinder and constantly obscuring the illuminating elementfrom a point of view determined by its rotary adjustment whilepermitting the constant projection of light from the lamp through thecomplementary segmental portion or" the cylinder of which it is asegment, said shutter including a reflector on the inner face thereof,means adjacent the peripheries of the base and top members respectivelyfor guiding said segmental shutter for complete rotation, and aplurality of bolts rigidly connecting the top and bottom members.

7. In a lamp, the combination with a relatively heavy flat base memberadapted to rest on and slide over a supporting surface, of anilluminataoia'i ing element carried by said base member, a con: nectionfrom a source of illuminative supply to said illuminating elementthrough said base member above the bottom surface thereof, a relativelyheavy top member spaced above and mounted on said base member, aplurality of bolts rigidly connecting the top and bottom members,transparent protective means held by and between said base member andsaid top member and completely surrounding said illuminating element,and means outside of said transparent protective means to control theprojection of light in varying directions, said last-named meansincluding a reflector.

8. In a lamp, the combination with a base member adapted to rest on andslide over a supporting surface, of an illuminating element carried bysaid base member, means extending through said base member above thebottom thereof for connecting said illuminating element to a source ofilluminative supply, an opaque top member spaced above said base member,a cylindrical transparent protective means between said base member andsaid top member, means for clamping said top member against saidtransparent protective means and the latter against said base member,and cylindrical protective means mounted for rotation between said basemember and said top member outside of and concentrically with saidtransparent cylindrical protective means, said outer protective meanshaving perforate and opaque segments, the opaque segment of saidprotective means constantly obscuring the illuminating element from apoint of view determined by its rotary adjustment and the perforatesegment permitting the constant projection of light from the lamptherethrough.

9. In a lamp, the combination with a relatively heavy flat bottomed basemember, of a relatively heavy flat top member spaced therefrom, anilluminating element between said base member and said top member,transparent protective means surrounding said illuminating elementbetween said base member and said top member, adjustable protectivemeans surrounding said illuminating element including an opaque shuttermounted for rotation outside of said transparent protective means, and aplurality of bolts rigidly connecting the top and bottom members.

10. In a lamp, the combination with a rela tively heavy flat bottomedbase member, of a relatively heavy flat top member spaced therefrom, anilluminating element between said base member and said top member,transparent protective means surrounding said illuminating elementbetween said base member and said top member, adjustable protectivemeans surrounding said illuminating element including an opaque shuttermounted for rotation outside of said transparent protective means, saidshutter including a reflector on the inner face thereof, and a pluralityof bolts rigidly connecting the top and bottom members.

NTLS D. LEVIN.

